(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A block with a mass of 150kg is supported by a cable which passes over a 150 mm diameter pulley that is attached to a frame. Determine all forces acting on member BCD of the frame.

The distance from A to B is 600mm, and the distance from A to C(just horizontal distance) is 400mm. Distance from A to D is 450mm. Also, the cable is at a 70 degree angle from the +y axis(or a 20 degree angle from the x).

2. Relevant equations

3. The attempt at a solution

Me and a buddy, are stuck on this. We are having a hard time with these type of problems. Need a walk though(real slow). I drew a free body diagram.

I've got forces on A(Ax and Ay), B(Bx and By), D(Dx and Dy). Also the pulley with a tension(T). Am I missing anything?

I don't understand how to solve these type of problems. In class, we usually make a lot of equations with unknowns...and then solve from the unknowns. This is usually done by summing forces in the x and y direction and then also taking moments about a few points(I think). I'm not sure what to use though....Please help....I'm falling behind.

Thanks,

Brad

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# Forces acting on a member

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